JPH09320676A - Sealing structure for communication equipment input/ output terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing structure for preventing water droplets from splashing and entering an equipment main body during unplugging. SOLUTION: A seal 3 is provided between a plug 2 inserted in image information communications equipment in a housing 1 and the housing 1. The seal 3 is secured to the housing 1 at its outer periphery, and the portion of the end of its inner periphery which makes contact with the plug 2 is formed into a lip shape 31 elongated in the direction of the axis of the plug 2 in order to absorb the axial eccentricity between the connector and the plug 2. The lip 31 in its free state has its lip end 32 formed into an inverted U shape pointed outward. With the plug 2 inserted, the lip end 32 is inverted by the plug 2 and pressed into contact with the surface of the plug 2 while facing the inside of the U shape. When the plug 2 is disconnected, the lip end 32 is inverted outward because of its elastic force and restored to its free state while splashing clinging water droplets outwards.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure for input / output terminals of communication equipment, and more particularly to a seal structure having a drip-proof structure.

[0002]

2. Description of the Related Art An image information communication device such as a still image terminal is provided with an input / output terminal which enables input / output from an external video camera, communication device or the like. This input / output terminal has a structure in which a connector is provided on the device body side, and a plug at the end of a video cable from an external device is inserted into the connector. In order to provide a drip-proof structure, an elastomer drip-proof seal is installed in the opening near the connector.

FIG. 7 shows a conventional seal structure. Reference numeral 1 denotes a housing on the side of the main body of the communication device. A connector (not shown) for input / output terminals is provided inside the opening of the housing 1, and a plug 2 of an external device is inserted into this connector. An elastomer seal 6 is provided in the housing 1 opening near the connector.
Is installed, and has a structure for drip-proofing with the insertion plug 2.

The seal 6 has an outer peripheral base fixed to the housing 1 and absorbs axial eccentricity between the connector and the plug 2.
The contact portion of the tip of the inner circumference with the plug 2 has a lip shape extending in the axial direction of the plug, and the plug 2 is tightened from the outer circumference. The lip 61 has a shape in which the lip tip 62 is directed inward in order to reduce the sliding resistance between the lip 61 and the surface of the plug 2 when the plug is inserted. The plug mounting state is shown in FIG.

[0005]

FIG. 9 shows the operation in the process of removing the plug from the plug mounted state.
It is assumed that a water droplet 4 adheres between the seal 6 on the outside of the housing 1 and the plug 2 when the plug is attached. When the plug 2 now inserted in the connector is pulled out (b),
The lip tip 62 is deformed to the outside by dragging the lip tip 62 due to the sliding resistance with the surface of the plug 2. At the instant (c) when the plug 2 is completely pulled out, the lip tip 62 is turned inward in an attempt to restore its original state due to its elastic force. By this momentary recoil of the lip, the water droplet 4 attached to the lip 61 and the plug 2 is sucked and scattered inward.

As described above, the conventional seal and its lip structure have a drawback that the drip-proof function is impaired by pulling out the plug.

An object of the present invention is to provide a seal structure for preventing water droplets from splashing and entering the inside of the main body of the device when the plug is pulled out.

[0008]

The above object is to provide a drip-proof seal structure in which a contact portion with a plug has a lip shape extending in the axial direction of the plug, and in a free state, a lip tip faces outward, and a plug is inserted. Is a structure that tightens the plug surface by reversing it due to the contact resistance with the plug surface and tightening the plug surface, and when the plug is pulled out, it has the property of restoring to the above free state shape by its own elastic force. It is achieved by being.

According to the above-mentioned sealing structure, the tip of the lip faces outward in the free state, and in the state of inserting the plug, the lip tip is inverted due to the contact resistance with the surface of the plug and faces inward. Then, when the plug is pulled out, the tip end of the lip is restored to the original free state shape facing outward due to the elastic force. By the reversing operation at the time of restoring the lip, water droplets attached even at the moment when the plug is pulled out are scattered to the outside, so that a complete drip-proof effect can be obtained.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which the same reference numerals as in the prior art indicate the same or corresponding parts. A drip-proof seal 3 is provided between the housing 2 and the plug 2 inserted in the connector of the image information communication device in the housing 1. The seal 3 has an outer peripheral base fixed to the housing 1 and absorbs axial eccentricity between the connector and the plug 2, so that a contact portion with the plug 2 is formed in a lip shape 31 extending in the plug axial direction at the inner peripheral tip. ing.

In the free state, the lip 31 has an inverted U-shape with the tip 32 of the lip facing outward.

FIG. 2 shows a state in which the plug 2 is inserted. When the plug is inserted, the lip tip 32 is pushed by the tip of the plug and turned over, and is pressed against the surface of the plug 2 so that the tip 32 faces the inside of the U-shape evenly.

FIG. 3 shows the attaching / detaching operation of the plug 2. In FIG. 3 (a), the lip tip 32 is turned inward when the plug 2 is completely inserted into the connector, and the surface of the plug 2 is clamped and pressed. To prevent the intrusion of water droplets 4 from the outside.

(B) shows a state in which the plug 2 is slightly moved in the pulling-out direction when the inserted plug 2 is pulled out, and the lip tip 32 is slightly deformed to the outside by the contact resistance with the surface of the plug 2.

(C) and (d) show the moment when the plug 2 is pulled out, and the lip tip 32 that has been deformed inward follows the movement of the plug 2 and flips outward due to its own elastic force. The tip of the free state of is restored to the shape of an inverted U-shape facing outward. At this time, due to the elastic reversal operation of the tip of the lip, the water droplet 4 attached between the seal 3 and the plug 2 is splashed to the outside.

In this way, by the reversing operation of the lip tip 32, the water droplets attached to the plug 2 are scattered even when the plug 2 is pulled out, so that the water droplets can be completely prevented from entering the inside of the communication device body.

FIG. 4 shows another embodiment of the present invention in which the tip shape of the lip 51 formed on the seal 5 is modified. The lip 51 extending in the axial direction of the plug at the tip of the inner circumference of the seal has an inverted U-shape that once faces outward, and the tip extending therefrom has a straight lip tip shape 52 that is inclined outward and faces in the axial direction of the plug. There is.

When the plug 2 is inserted as shown in FIG. 5, the lip tip 52 is pushed and inverted by the tip portion of the plug 2, the tip 52 is deformed in a U shape and faces inward, and is uniformly pressed against the surface of the plug 2. Come to do.

FIG. 6 shows the detaching / attaching operation state of the plug 2 in this case. FIG. 6 (a) shows a state in which the plug 2 is completely inserted into the connector and is deformed into a U-shape to be pressed against the surface of the plug 2. The sealing effect of the lip tip 52 prevents the intrusion of water droplets 4 from the outside.

(B) shows a state in which the plug 2 is moved in the pulling-out direction when the plug 2 is pulled out, and the lip tip 52 is slightly deformed outward due to the contact resistance with the plug surface.

(C) and (d) are the moment when the plug 2 is pulled out, and the lip tip 52 deformed inward is the plug 2
As it moves, the tip end 52 in the original free state is linearly restored by being reversed outward by the elastic force. At this time, the water droplet 4 between the seal 5 and the plug 2 is scattered outward by the elastic reversal operation of the lip tip 52.

[0023]

As described above, according to the present invention, in addition to the drip-proof effect when a plug such as a video cable from an external device is inserted into the input / output terminal of an image information communication device, the plug is removed when the plug is removed. The drip-proof property is also secured, and the handling of the device during precipitation is improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a seal structure according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state where the plug of FIG. 1 is mounted.

FIG. 3 is an explanatory diagram of a plug attaching / detaching operation of FIG.

FIG. 4 is a configuration diagram of a seal structure according to another embodiment of the present invention.

FIG. 5 is a diagram showing a state where the plug of FIG. 4 is attached.

FIG. 6 is an explanatory diagram of a plug attaching / detaching operation of FIG.

FIG. 7 is a structural diagram of a conventional seal structure.

FIG. 8 is a diagram showing a state where the plug of FIG. 7 is attached.

9 is an explanatory diagram of a plug attaching / detaching operation of FIG.

[Explanation of symbols]

1 ... Housing, 2 ... Plug, 3 ... Seal, 31 ... Lip, 32 ... Lip tip, 4 ... Water drop.

Claims (1)

[Claims] 1. A structure in which a communication device main body is provided with an input / output terminal for enabling input / output from an external communication device, and the input / output terminal has a cable end plug inserted from the external communication device into a connector on the communication device main body side. In addition, in the seal structure of the communication device input / output terminal in which a drip-proof seal is installed in the opening near the connector on the communication device body side, in the seal, the contact portion with the plug extends in the plug axial direction. The structure is lip-shaped, with the tip of the lip facing outward in the free state, and turning inward when the plug is inserted to tighten the plug surface, and when pulling out the plug, the elastic force exerts its own shape in the free state. A seal structure for communication device input / output terminals, which is characterized by having a property of being restored to.